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Unabe to change settings in revise modbus secondary

I am changing the serial port from com1 to com4 in "REvise Modbus Secondary", after i change it and do a save, i reopen lookout and the com port has changed back to com1.  I am running lookout 6.1
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What if you modify other parameters?
Open the .lks file by notepad. Check if COM1 is changed to COM4.
The code for modbus object looks like
Modbus1 = new Modbus (1, "COM4", 9600, "none", 8, 1, , 2000, 2000, 125, 125, 800, 100, 8, 4, 4, 500, true, false, , , 0, , false);
 
Ryan Shi
National Instruments
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